# Drosophila erecta males court only in food odour, Rockefeller team reports in Nature fly study

- Published: 2026-11-05 12:30 UTC
- Section: Life & Health › Biology & biochemistry
- Tags: Drosophila erecta, fruit fly mating behaviour, food volatiles, male sexual arousal, courtship circuit, Drosophila melanogaster comparison, visual motion feedback, Vanessa Ruta, Philipp Brand, Pandanus host fruit
- URL: https://realtech.media/news/rt-2ff60352adf29ea9edd28caa_drosophila_erecta_males/

**Food volatiles act as a strict gate for male sexual arousal in Drosophila erecta but not in D. melanogaster, the authors report. Group visual motion amplifies the effect.**

![Drosophila erecta males court only in food odour, Rockefeller team reports in Nature fly study](https://sgzwpqqelzmajkcubgkl.supabase.co/storage/v1/object/public/rt-media/2026/11/6ac094437facb577.jpg)
*Fanny (Appleton) Longfellow (1817-1861), Wikimedia Commons, Public domain*

Researchers at Rockefeller University, in the laboratory of Vanessa Ruta, report in Nature (dx.doi.org) that mating in the fruit fly *Drosophila erecta* depends strictly on the ecological and social environment that forms when flies aggregate densely on a food patch [1]. The first author is Philipp Brand, a former postdoc in the lab who now leads a research group at the Max Planck Institute for Brain Research in Frankfurt. The press release was published on 4 November 2026.

## Food odour as a gate for arousal

According to the authors, food volatiles directly promote male sexual arousal and prompt males to sample and pursue potential mates [1]. In the press release, the researchers state that without the scent of fermented fruit *D. erecta* males show no interest in courtship.

The species' reproduction and population density are tightly linked to the seasonal availability of its host fruit, the screwpine *Pandanus*, which leaves a narrow window for individuals to meet and mate [1]. The authors suggest that the species has evolved behavioural adaptations that couple reproduction to sensory cues from its host [1].

## Visual feedback and species differences

Male pursuit produces dynamic interactions across the group. The resulting visual motion transforms each male's visual field and further amplifies his arousal, creating a multisensory feedback loop that promotes courtship across individuals [1]. *D. erecta* males are highly sensitive to this increase in visual motion, in contrast to *D. melanogaster* [1].

In *D. melanogaster*, food odour can promote arousal but is dispensable for vigorous courtship [1]. Comparative circuit analyses show that species-specific arousal thresholds reflect variation in how olfactory input modulates conserved nodes controlling courtship drive. Food volatiles are therefore a strict sensory gate only in *D. erecta* [1].

Brand says that *D. erecta* shares conserved neural circuitry with related *Drosophila* species, but its brain requires an additional input, the aroma of food, to activate neurons that promote sexual arousal. Ruta says courtship is shaped by ecological and social context and cannot be separated from it.

The paper also notes that *Drosophila* species differ in where they mate. *D. elegans* establishes individual territories on host flowers, and species of the Hawaiian subgroup perform competitive lekking in vegetation around their hosts [1].

## Sources

1. [dx.doi.org](http://dx.doi.org/10.1038/s41586-026-11209-9)
2. [EurekAlert](https://www.eurekalert.org/news-releases/1150296)

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Source: RealTech, realtech.media — https://realtech.media/news/rt-2ff60352adf29ea9edd28caa_drosophila_erecta_males/